Eye and head contributions to gaze stability

眼睛和头部对注视稳定性的贡献

• 批准号: 6741183
• 负责人: ASIM HAQUE
• 金额: $ 3.32万
• 依托单位: WASHINGTON UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-01-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6741183
• 关键词: behavior test; behavioral /social science research tag; body movement; electrodes; eye movements; head movements; neural information processing; neurophysiology; pigeons; predoctoral investigator; space perception; vestibular pathway; vestibuloocular reflex; visual fixation

DESCRIPTION (provided by applicant): Eye and head reflexes are essential in maintaining the orientation of gaze in space at all times such that retinal images are stabilized. Although the VOR in pigeons (like all lateral-eyed animals) has been reported as undercompensatory, during natural behaviors such as flight, birds must be able to maintain gaze stability, perhaps using concerted head movement involving the VCR, CCR and inertia (head responses) to maintain steady gaze. In addition, different functional roles for vestibular afferents based on discharge dynamics have been previously proposed. Irregularly firing afferents are known to be sensitive to anodal galvanic currents which seem to have little effect upon the angular VOR. It is postulated that the irregular afferents may play a more significant role in the functional pathways of head and neck responses to motion. In the present proposed series of experiments, three-dimensional gaze stability will first be determined in pigeons during rotational and linear motion, examining the relative contributions of the eye and head. Second, the effects of altering the input from irregularly firing afferents upon gaze stability will be determined. For both objectives, quantitative measures of interest will include eye-in-space, head-in-space, and eye-in-head.

描述（由申请人提供）：眼睛和头部反射对于始终保持空间注视方向至关重要，从而稳定视网膜图像。尽管据报道，鸽子（像所有侧眼动物）的 VOR 补偿不足，但在飞行等自然行为期间，鸟类必须能够保持凝视稳定性，也许可以使用涉及 VCR、CCR 和惯性（头部反应）的协调头部运动来保持稳定凝视。此外，之前已经提出了基于放电动力学的前庭传入的不同功能作用。已知不规则发射传入对阳极电流敏感，这似乎对角 VOR 影响很小。据推测，不规则传入可能在头颈部运动反应的功能通路中发挥更重要的作用。在目前提出的一系列实验中，首先将确定鸽子在旋转和线性运动期间的三维凝视稳定性，检查眼睛和头部的相对贡献。其次，将确定改变不规则发射传入的输入对凝视稳定性的影响。对于这两个目标，感兴趣的定量测量将包括“太空之眼”、“太空之眼”和“头部之眼”。